How To Proceed With Troubleshooting

HINT: 

The Techstream can be used in steps 3, 4, 5, 7 and 11.

1. VEHICLE BROUGHT TO WORKSHOP 

   NEXT: Go to next step 

2. CUSTOMER PROBLEM ANALYSIS 
   1. Confirm problem symptoms.

      NEXT: Go to next step 

3. CHECK MULTIPLEX COMMUNICATION SYSTEM 
   1. Check for DTCs. Refer to DTC CHECK / CLEAR .

      HINT: 

      The 4WD control ECU sends the signals from indicator light to the gateway ECU via CAN communication, and the gateway ECU sends the signals to the combination meter assembly via multiplex communication system (BEAN).

      Result

      Result	Proceed to
      DTC is not output	A
      DTC is output	B

      B → CHECK MULTIPLEX COMMUNICATION CIRCUIT 

      A: Go to next step 

4. CHECK CAN COMMUNICATION SYSTEM 
   1. Check for DTCs. Refer to DTC CHECK / CLEAR .

      HINT: 

      The ECU of this system is connected to the CAN communication system.

      Therefore before starting troubleshooting, make sure to check that there is no trouble in CAN communication system.

      Result

      Result	Proceed to
      DTC is not output	A
      DTC is output	B

      B → CHECK CAN COMMUNICATION CIRCUIT 

      A: Go to next step 

5. CHECK DTC 
   1. Check for DTCs. Refer to DTC CHECK / CLEAR .
      1. Record the DTCs.
   2. Clear the DTCs.
   3. Recheck for DTCs.
      1. Simulate the malfunction and check if the DTCs are output again.

         Result

         Result	Proceed to
         DTC is output	A
         DTC is not output	B
         DTCs are not output, and the malfunction cannot be simulated or checked	C

      B → GO TO STEP 10 

      C → SYMPTOM SIMULATION 

      A: Go to next step 

6. DTC CHART 

   NEXT: Go to next step 

7. CIRCUIT INSPECTION 

   NEXT: Go to next step 

8. REPAIR 

   NEXT: Go to next step 

9. CONFIRMATION TEST 

   NEXT → END 

10. PROBLEM SYMPTOMS TABLE 

    NEXT: Go to next step 

11. CIRCUIT INSPECTION 

    NEXT: Go to next step 

12. CONFIRMATION TEST 

    NEXT → END